Information
Activating the zone wide TCP Reset setting for the Trust zone will reset connection that have either timeout out or when a host attempt to connect on a service that is not allowed due to configuration. If the firewall times out an inactive session but a host still marks the session as up, when the host next attempts to communication it will receive a TCP Reset. The TCP Reset will cause the host to reinitialize the TCP 3-Way handshake for a new session instead of repeatably attempting to communication on a session the firewall has timed out.
Solution
You may navigate to the following ScreenOS menu location: Configuration > Network > Zones. Once there you may select the appropriate zone to further edit.